Comentário sobre Êxodo 6:18

ושני חיי קהת … ושני חיי עמרם וגו׳ AND THE YEARS OF THE LIFE OF KOHATH WERE etc. … AND THE YEARS OF THE LIFE OF AMRAM WERE etc. — From these numbers we may gather regarding the period of residence of the children of Israel, — viz., four hundred years, of which Scripture speaks, that these four hundred years were not passed in Egypt alone, but that they date from the day of Isaac’s birth. You know that Kohath was one of those who went down to Egypt; now reckon all his years (133) although really we should not take into account the years he lived before he went down to Egypt, and the years of Amram, his son (137), and the eighty years of Moses, the latter’s son, which he had attained when the Israelites left Egypt, and you will not find them totaling to four hundred, and in this calculation many years of the sons’ ages are included in those of their fathers (i. e. in such a calculation one must deduct in each instance the father’s age when his son was born since this number is included in the total age of each of these persons) (cf. Rashi on Exodus 12:40)

ובני קהת עמרם ויצהר וחברון ועוזיאל. Whereas the Torah provides details of the names of the first three sons of Kehot, i.e. Amram, Yitzhar and Uzziel, no mention is made of any sons of Chevron. If this were to lead us to assume that Chevron had no sons, the Torah in Numbers 26,58 adds details under the heading: “and the family of Uzziel, etc.” This raises the question why the Torah kept silent about these details at this point. The reason appears to be that the names of the sons of Chevron do not appear in connection with any of their activities elsewhere in the Torah, whereas the names of the ones mentioned here appear also in their own right, not only as sons of their respective fathers. Amram appears as father of Moses, Aaron, and Miriam. The sons of Yitzhar appear in connection with the uprising of Korach (numbers 16,1) The sons of Uzziel, Mishael and Eltzafan, appear in connection with the burial of the two sons of Aaron Nadav and Avihu in Leviticus 10,4. The sons of Korach, Assir and Elkanah are complimented as not having died in the uprising headed by their father in Numbers 26,12. The sons of Aaron are mentioned specifically already in Exodus 24,1 as is Pinchas, the son of Eleazar. The sons of his brother Ittamar are not mentioned as they do not feature specifically elsewhere in the Torah.

'ובני קהת עמרם ויצהר וגו, “and the sons of Kehot were Amram, Yitzhar, etc.;” the reason why the Torah does not mention the sons of Moses and the sons of Chevron and Ittamar, is that no specific action in which these had been involved has been recorded. The Torah did mention the sons of Amram, as they had been mentioned independently in the Torah so many times, i.e. both Moses and Aaron. The sons of YItzhar were mentioned on account of their involvement in the uprising of Korach. The sons of Uzziel were mentioned because they were called upon to remove the bodies of Nadav and Avihu who had died in the precincts of the Tabernacle on account of having offered unauthorized incense in the Sanctuary, and having added man made fire to their censers. The sons of Ittamar were mentioned in Chronicles on account of the High Priest Eli. (Rash’bam)